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/* $XFree86: xc/lib/GL/mesa/src/drv/ffb/ffb_fifo.h,v 1.2 2002/02/22 21:32:58 dawes Exp $ */
#ifndef _FFB_FIFO_H
#define _FFB_FIFO_H
#define FFBFifo(__fmesa, __n) \
do { ffbScreenPrivate *__fScrn = (__fmesa)->ffbScreen; \
int __cur_slots = __fScrn->fifo_cache; \
if ((__cur_slots - (__n)) < 0) { \
ffb_fbcPtr __ffb = __fmesa->regs; \
do { __cur_slots = (((int)__ffb->ucsr & FFB_UCSR_FIFO_MASK) - 4); \
} while ((__cur_slots - (__n)) < 0); \
} (__fScrn)->fifo_cache = (__cur_slots - (__n)); \
} while(0)
#define FFBWait(__fmesa, __ffb) \
do { ffbScreenPrivate *__fScrn = (__fmesa)->ffbScreen; \
if (__fScrn->rp_active) { \
unsigned int __regval = (__ffb)->ucsr; \
while((__regval & FFB_UCSR_ALL_BUSY) != 0) { \
__regval = (__ffb)->ucsr; \
} \
__fScrn->fifo_cache = ((int)(__regval & FFB_UCSR_FIFO_MASK)) - 4; \
__fScrn->rp_active = 0; \
} \
} while(0)
#endif /* !(_FFB_FIFO_H) */
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